lilliendahl



NITED STATES PATENT OFFICE.

G. A. LILLIENDAHL, OF NEW YORK, N. Y.

:BUnsLAn-A-LARM.

Specification of Letters Patent No. 22,959; dated February 15, 1859.

To all whom it may concern:

Be it known that I, G; A. LILLIENDAHL, of the city, county, and State of NewYork, have invented a new and Improved Burglar- Alarin; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure l represents a longitudinal vertical section of my invention, as applied to a door. Fig. 2, is a side elevation of do., as applied to a window, and, Fig. 3, is a plan or top view of the same.

Similar letters of reference in t-he three ligures indicate corresponding parts.

This invention consists in arranging a slide the outer end of which is bent up so as to form a lip and the edges of which are turned over so as to fit over a plate which is provided with spurs to secure the same in the required spot and which is also provided with a lip similar to the one formed by the end of the slide, so that a cartridge filled with some highly explosive substance when placed on the slide between the two aforesaid lips is exploded by the slightest pressure on the slide or on the plate.

-To enable others skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, is a plate the edges of which are bent over wires B, which are turned down and provided with sharp points so as to form -spurs a, c, and one end of the plate A, is turned up so as to form a lip b. Theedges which are bent over the wires B, form the guides for a slide C, the edges of which are bent over so as to fit nicely over the plate A, and the outer end of this slide is turned up so as to form a lip c. This lip must be made somewhat higher and stronger than the lirst lip b, so that when the device is used for a door which does not corne down close to the floor, the lip c, is reached by the door and that the same, when the door strikes against it, dont bend down. Between'the two lips Z), and c, and on the slide C, a cartridge D, is placed, which is s0 constructed that it explodes by pushing its ends together. Two strips of paste board d, (Z, are cut out to fit the slide C, and rough surfaces e are attached to them, at a certain distance from their ends, and the end of one strip is placed on the rough surface of the placing the cartridge on the slide C, and

between the lips b and c, it is pla-ced before a door at a little distance from the same as represented in Fig. l, so that when the door is opened it strikes against the lip c, and pushes the slide C, over the plate A. The latter one is prevented from giving way by the spurs a, c, which catch in the carpet if such a one be on the licor, or which are driven into the oor sufhciently to offer the necessary resistance. By thus pushing the slide over the plate the lips c and b are brought closer together and the cartridge explodes so that the report of the saine calls the attention of other persons in the house to the spot.

This device may be. applied with equal advantage to a window as represented in Fig'. 2. In this case the plate A, is fastened to the frame of the upper sash by driving the spurs a, in the same as represented in the drawing and at such a distance from the lower sash that the slide C, with its lip c, rests on the upper edge 0f the lower sash leaving room enough between the lips Z), and c, for the cartridge. In this case the cartridge is exploded by raising the lower sash or by pushing down the upper one, so that my device serves as a perfect safeguard against all persons which intend to burglariously enter a house or rooin. A

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is,

The arrangement of the slide O, and plate A, with the lips c, and b, so that a cartridge placed on the slide and between theV two lips is exploded by pushing the slide in substantially as and for the purpose speciiied.`

G. A. LILLIENDAHL.

Titnesses WM. TUscH, IV. HAUrr. 

